package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author <a href="https://gitee.com/hebei-dynasty-competition">搜一码赛</a>
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    /**
     * 验证手机号并返回验证码
     *
     * @param phone
     * @param session
     * @return
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合返回错误信息
            return Result.fail("手机号格式错误");
        }

        //3.符合,生成验证码
        String code= RandomUtil.randomNumbers(6);
        //4.保存验证码到redis 根据phone
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5.模拟发送验证码
        log.debug("发送验证码成功,验证码为: {}",code);
        return Result.ok();
    }

    /**
     * 登录功能
     * @param loginForm
     * @param session
     * @return
     */
    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone=loginForm.getPhone();
        String code=loginForm.getCode();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号填写错误");
        }
        //2.检验验证码(从redis中取出验证码)
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        //3.不一致,报错
        if(!Objects.equals(cacheCode, code)){
            return Result.fail("验证码错误");
        }
        //4.一致,根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5.判断用户是否存在
        if (user == null) {
            //6.不存在,创建新用户并保存
           user= createWithPhone(phone);
        }
        //随机生成token,作为登录令牌
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        //将userDTO对象转换为HashMap存储
            Map<Object, Object> userMap = new HashMap<>();
            userMap.put("id",userDTO.getId().toString());
            userMap.put("nickName",userDTO.getNickName());
            userMap.put("icon",userDTO.getIcon());
//        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO);
        String tokenKey=LOGIN_USER_KEY+token;
        //7.保存用户信息到redis中
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //7.2设置token有效期
        stringRedisTemplate.expire(tokenKey,30L,TimeUnit.MINUTES);
        //8返回token
        return Result.ok(token);
    }

    /**
     * 创建用户
     * @param phone
     * @return
     */
    private User createWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        //2.保存用户
        save(user);
        return user;
    }
}
